In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Some asteroids have other asteroids orbiting them.
131
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Lightning strikes about 6,000 times per minute on this planet!
158
Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
14
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178